Well, I don't bring the sat dish from home as it is mounted on our roof, but I purchased the same exact dish online for about $30 and use it exclusively for RVing. Whether you are using Directv or Dish you will need to be able to aim with precision in order to gain enough signal strength for receiver to be able to download programming. It is a bit simpler if just trying to acquire SD channels as this programming is usually contained on one satellite.
The process is not overly difficult and once mastered takes but a few minutes to complete. The more you practice the easier it gets, if you have no experience you could practice at home until you get familiar with the process. There are videos online and tools are available to help ease the pointing process. We have been doing it for over a decade with both Directv and Dish and rarely takes more than 5 minutes to have all the satellites locked in.
There are roof mounted and portable automated domes/cubes that can do all the work for you, just supply the coax and power needed to operate these devices and you should be up and running. When choosing an automated sat finder check the specs for the type of receivers and programming they can use and deliver. Not all provide HD content and some require switching back and forth from satellites to gain access to your programming level. Happy Camping!!!